Sniper & Triggerman not so much, as they specifically refer to 2-handed weapons and 1-handed firearms respectively.
Sniper abilities apply to 2 handed weapons
, not 2 handed firearms. This is specifically so that you can have bow-based Snipers. Definition of handedness can be very important in that case.
The 1/round limitation trumps the feats. Powers are not just weapons with a skill check attached, that skill check and the 1/round limitation is there to prevent abuse. The end. Thus, some feats cannot be used with psionic powers, as they break the explicit brake applied to powers in general.
At which point the question arises of why bother specifying psionic attacks are considered hurled attacks for the purposes of feats and such in the first place, since none of the things that enhance hurled attacks can apparantly ever be applied to them (admittedly a bit of Trick Shot would still seem to work, but, well, meh - people have better things to acquire than half
Because there are still a number of feats that can, indeed, effect psionic attacks? As for feats, off the top of my head there's still Weapon Focus and Hurled Master (from Practice Makes Perfect) that would specifically affect powers as hurled attacks, plus you get to use all the other general ranged feats (that do not increase number of attacks) with them. So the "problem" here is simply that those hurled feats do not override the 1 attack/round limit on psion attacks...which they were never explicitly intended to do.
Just because they count as hurled attacks does not make them deficient because every option for hurled attacks does not apply to them - show me a hurled attack that does equivalent fire damage and I'll be a little more sympathetic.
I'm sure Morg was being generous here to allow characters to take a forte with their powers, psion Soldiers to apply their Weapon Specialist abilities to it, and open the door for future damage/effect enhancing feats and abilties to add on to it.
Well, you could just have stipulated that Psionic Attack was its own proficiency and you'd still have that open door without a rule mechanic that does nothing.
Yeah, but you're actually gaining MORE BENEFIT this way - at least there's SOME feats apply to psion abilities when they're hurled attacks, vs. the zero feats that apply to a psion proficiency. For starters, they benefit from the upcoming Practice Makes Perfect
But I guess we screwed that up, too